A system for roasting, grinding, brewing and dispensing coffee comprising: (a) a coffee cartridge containing: (i) unground and (ii) unroasted or part-roasted coffee beans, said cartridge having walls defining a cartridge chamber in which the beans are confined, wherein part or all of at least one wall of the cartridge is openable, and the openable wall of the cartridge is opposed to a slidable wall thereof, said slidable wall comprising: i. inner and outer surfaces, the inner surface being in contact with the beans; ii. a peripheral sealing portion on the inner surface; and iii. a central portion bounded by the peripheral sealing portion and comprising a screen for retaining the beans within the cartridge chamber while permitting a flow of coffee brew therethrough; wherein said cartridge is secured in a cartridge holder of: (b) coffee-making apparatus comprising: i. a collector head adapted to contact and support the outer surface of the slidable wall of the cartridge and to collect coffee brew flowing therethrough; ii. means for bringing the collector head into contact with the outer surface of the slidable wall and for sliding said slidable wall towards the openable wall of the cartridge, thereby opening the wall to produce an opened wall and exposed beans; iii. means for roasting the exposed beans; iv. an extraction sleeve having inner and outer surfaces and a sealing rim, the extraction sleeve being adapted to enter the cartridge chamber via the opened wall such that the sealing rim forms a face pressure seal with the peripheral sealing portion of the slidable wall of the cartridge, which seal isolates the exposed beans from the rest of the cartridge and contains them within an extraction chamber formed by the inner surface of the extraction sleeve and the central portion of the slidable wall; v. a blade grinder adapted to rotate within the extraction sleeve, thereby levitating the beans off the inner surface of the slidable wall and fragmenting them to form coffee grounds within the extraction chamber; vi. bedding means for distributing the coffee grounds such that they are disposed substantially evenly on the inner surface of the slidable wall of the cartridge thereby forming an extraction bed within the extraction chamber; vii. a source of hot water, optionally pressurized hot water; viii. an infuser head in fluid communication with the source of hot water and comprising infuser means comprising one or more outlets for the hot water, the infuser head being adapted to deliver hot water to the extraction bed within the extraction chamber, whereby coffee is extracted to yield a coffee brew; and ix. means for delivering said coffee brew to a drinking vessel for consumption. (a) a coffee cartridge containing: (i) unground and (ii) unroasted or part-roasted coffee beans, said cartridge having walls defining a cartridge chamber in which the beans are confined, wherein part or all of at least one wall of the cartridge is openable, and the openable wall of the cartridge is opposed to a slidable wall thereof, said slidable wall comprising: i. inner and outer surfaces, the inner surface being in contact with the beans; ii. a peripheral sealing portion on the inner surface; and iii. a central portion bounded by the peripheral sealing portion and comprising a screen for retaining the beans within the cartridge chamber while permitting a flow of coffee brew therethrough; i. inner and outer surfaces, the inner surface being in contact with the beans; ii. a peripheral sealing portion on the inner surface; and iii. a central portion bounded by the peripheral sealing portion and comprising a screen for retaining the beans within the cartridge chamber while permitting a flow of coffee brew therethrough; i. a collector head adapted to contact and support the outer surface of the slidable wall of the cartridge and to collect coffee brew flowing therethrough; ii. means for bringing the collector head into contact with the outer surface of the slidable wall and for sliding said slidable wall towards the openable wall of the cartridge, thereby opening the wall to produce an opened wall and exposed beans; iii. means for roasting the exposed beans; iv. an extraction sleeve having inner and outer surfaces and a sealing rim, the extraction sleeve being adapted to enter the cartridge chamber via the opened wall such that the sealing rim forms a face pressure seal with the peripheral sealing portion of the slidable wall of the cartridge, which seal isolates the exposed beans from the rest of the cartridge and contains them within an extraction chamber formed by the inner surface of the extraction sleeve and the central portion of the slidable wall; v. a blade grinder adapted to rotate within the extraction sleeve, thereby levitating the beans off the inner surface of the slidable wall and fragmenting them to form coffee grounds within the extraction chamber; vi. bedding means for distributing the coffee grounds such that they are disposed substantially evenly on the inner surface of the slidable wall of the cartridge thereby forming an extraction bed within the extraction chamber; vii. a source of hot water, optionally pressurized hot water; viii. an infuser head in fluid communication with the source of hot water and comprising infuser means comprising one or more outlets for the hot water, the infuser head being adapted to deliver hot water to the extraction bed within the extraction chamber, whereby coffee is extracted to yield a coffee brew; and ix. means for delivering said coffee brew to a drinking vessel for consumption.