G: TL;DR:
Stick to rotini, butter, salt, and one or two gentle additions like boiled chicken, soft-cooked carrots, or zucchini. Avoid acid (tomato, lemon), spice, garlic, onion, or cheese.

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Here’s a gentle base meal for an acidic stomach:

• Rotini (plain or whole wheat, if tolerated)
• Unsalted butter (or olive oil if you prefer)
• A pinch of salt

Optional safe additions:

• Boiled or shredded chicken breast (unseasoned or just lightly salted)
• Steamed carrots or zucchini, diced small
• A bit of plain low-fat yogurt stirred in (if dairy sits okay)
• A sprinkle of parsley or basil (avoid oregano or chili)

Avoid:

• Tomato sauce
• Garlic/onion (even powder)
• Cheese, especially aged ones
• Lemon juice or vinegar
• Pepper or chili

Let me know if you're avoiding fat, dairy, or any specific triggers and I can tweak further.

G: Yes, canned tuna is generally okay for an acidic stomach if you follow these conditions:

• Use tuna packed in water, not oil or brine.
• Drain it well.
• Avoid mixing it with mayo, mustard, onions, or pickles.
• Add it plain to your rotini with a bit of butter or olive oil.

Optional gentle version:

• Rotini + butter + drained tuna + steamed zucchini or carrots.

Test in small amounts—some people get reflux from tuna, but many don’t.

G: Mayo is avoided for a sensitive or acidic stomach mainly because:

• It’s high in fat, which can slow digestion and trigger acid reflux in some people.
• Many commercial mayos contain vinegar or lemon juice, both of which are acidic.
• Some have preservatives or spices that can irritate the stomach lining.

If your stomach handles it fine, a small amount of plain, full-fat mayo (not light or flavored) might be okay—but start with a teaspoon and see how you feel.