Question: foods to eat when you can't open your mouth?
Answer: Choose soft moist foods. ... 
Soften bread products or crackers in soup, milk or tea; or spread with non-hydrogenated margarine, syrup or honey.
Use milk, cream, or broth to mash vegetables like potatoes, yams, squash or carrots.
Blend banana, melon, or frozen fruit into milkshakes or smoothies.