TASTY AND EASY TACO PIE

1- 1 1/2 lbs. ground beef
1 c. chopped onion
2 (1 1/4 oz.) envelopes taco seasoning 
1/2 tsp. salt
2 c. Bisquick 
2 c. milk
4 eggs
2- 2 1/2 c. shredded Cheddar cheese
1 tomato, diced, or sliced grape tomatoes
1/4 head of lettuce, shredded
1/3 c. sliced black olives
sour cream and salsa, optional

Preheat oven to 400 degrees.

Lightly spray a 9x13x2 inch baking dish. In a medium nonstick skillet, cook and stir beef and onion until beef is brown. Drain. Stir in salt and seasoning mix and spoon into baking dish. Beat Bisquick, milk, and eggs with whisk or electric beater until almost smooth, about 1 minute. Pour over meat.

Bake uncovered, until knife comes out clean, about 30 minutes. Sprinkle with cheese and bake until cheese is melted, about an additional 5 minutes. Let cool for 5 minutes. Make a Mexican salad by combining lettuce, tomato, and olives. Top with sour cream and salsa, if desired. Serve on the side.