3 1/2 c. onion, chopped
2 lbs. ground beef
3 c. grated sharp Cheddar cheese
6 eggs, beaten
2 tsp. dry thyme
1/2 c. Bisquick
4 tbsp. butter
3 c. milk
1 tsp. salt
Pinch of pepper

Saute onion in butter. Stir in ground beef; cook 10 minutes, drain. In large bowl, mix hamburger and rest of ingredients. Put in buttered 10 inch baking dish. Bake at 350 degrees 35 to 40 minutes.