1 pkg. Ronco macaroni and cheese dinner
1 (7 oz.) can tuna, drained and flaked
1 can condensed cream of mushroom soup
1/2 c. milk
1 tbsp. instant onion
1 tsp. lemon juice
1/8 tsp. garlic salt
1/2 c. crushed potato chips

Prepare dinner according to package, add tuna, soup, milk and seasonings. Pour into 1 1/2 quart casserole. Top with potato chips and bake at 350 degrees for 20 minutes.