Combine:

1 (10 3/4 oz.) can condensed cream of onion soup
1/2 c. mayonnaise or salad dressing
1/2 c. dairy sour cream
1/4 tsp. garlic powder
1/4 tsp. dried dill weed

Gently stir in:

2 (6 1/2 oz.) cans tuna, drained and flaked
1 (10 oz.) pkg. frozen chopped spinach, thawed and well drained
1 (8 oz.) can whole kernel corn, drained
1/2 c. chopped celery

Turn into a 12 x 7 1/2 x 2 inch baking dish. Top with one 16 ounce package frozen fried potato nuggets. Bake 45 minutes in a 350 degree oven. Let stand 5 minutes. Serves 6.