Canned tuna ideas:
This company creamed tuna is a family favorite. I usually serve over toast, cut diagonally to make triangles.
Salad Nicoise - tuna can be left in chunks or blended into the dressing. We’re not fond of kalamata olives so use black olives. Green beans can be replaced by asparagus if that’s affordable.
Edited to add this HO discussion with many recipe variations.
Tuna Biscuit Roll ups - Use 2 C. biscuit mix (Bisquick) or equivalent to make dough. Roll it out into a 10 x 12 rectangle. Combine 1 cup peas, a 7 oz can of tuna (drained) and ½ can cream of mushroom soup. Spread mixture on dough. Roll up from long side, jelly-roll fashion. Cut into 12 slices. Place slices on a greased baking sheet. Bake 20 minutes at 400 degrees or until baked through.