INCLUSION:  Self-reported/self-identified as Black or African American Resting systolic blood pressure of 120-149 mm Hg and diastolic blood pressure <100 mm Hg Residence in communities identified by the Massachusetts Department of Public Health as Suffolk County (Boston) food deserts: Brighton, Chelsea, Dorchester, Hyde Park, Mattapan, Revere, Roxbury, and Winthrop Able to receive home-delivered groceries or pick them up at a convenient location and willing to eat only the groceries provided over a 12-week period Have access to refrigeration, cooking appliances, and Wi-Fi/cellular service Have access to mobile device or computer to be able to conduct grocery orders via video conference or by phone Willing and able to complete required measurement procedures  EXCLUSION:  Laboratory Exclusions:  Serum potassium ≥5.2 mmol/L or <3.5 mmol/L Estimated glomerular filtration rate (eGFR) <30 mL/min per 1.73 m^2 by the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation Hemoglobin A1c ≥6.5%  Medication Exclusions:  Any use of medications that lower blood pressure or medications intended for hypertension treatment (including antihypertensives taken for non-hypertension purposes) within the last 6 months  Unstable doses (i.e. a change in the 2 months prior to screening or randomization) of the following:  Sodium-glucose co-transporter 2 (SGLT2) inhibitors Stimulants Inhaled or oral medications for asthma or chronic obstructive pulmonary disease (COPD) Hormone replacement therapy or thyroid hormone Weight-increasing psychotropic agents, including antipsychotic agents, lithium, and mirtazapine  Use of any of the following medications:  Potassium supplement, except if part of a multivitamin Warfarin (Coumadin) Chronic oral corticosteroid (intermittent use is okay) Weight loss medications (including GLP-1 receptor agonists) Unwillingness to keep same dose of vitamin, mineral, and botanical supplements Any medication not compatible with participation as determined by the investigators  Physical Exclusions:  Systolic blood pressure ≥150 mm Hg or diastolic blood pressure ≥100 mm Hg Body weight >420 pounds Arm circumference ≥50cm Weight loss or gain of >5.0% of body weight during prior 2 months  Medical History Exclusions:  Type 1 or Type 2 Diabetes defined as a hemoglobin A1c ≥6.5% or diabetes treatment Active cardiovascular disease or any event in the prior 6 months, including coronary artery bypass grafting (CABG), percutaneous transluminal coronary angioplasty (PTCA), myocardial infarction (MI), cerebrovascular accident (CVA), or congestive heart failure (CHF) exacerbation requiring hospital admission Cancer diagnosis or treatment in the last 2 years (non-melanoma skin cancer or localized breast or prostate or bladder cancer not requiring systemic therapy is acceptable) Active inflammatory bowel disease, bowel resection, malabsorptive syndrome, pancreatitis (episode within past year), or history of bariatric surgery Pregnancy or lactation or planned pregnancy Any emergency department (ED) visit for asthma or chronic obstructive pulmonary disease (COPD) in the last 6 months Any other serious illness or condition not compatible with participation as determined by the investigators  Lifestyle and Other Exclusions:  Significant food allergies, preferences, intolerances, or dietary requirements that would interfere with diet adherence Consumption of more than 14 alcoholic drinks per week or consumption of more than 6 drinks on one or more occasion per week Active substance use disorder that would interfere with participation Extreme food insecurity Participation in or planning to start weight loss program Current participation in another clinical trial Anticipated change in residence prior to the end of the study Families with no more than 3 adults at dinner time (alternative: 2 adults, 2 children or 1 adult, 4 children) Investigator discretion