frozen, thawed, chopped and squeezed dry. Heat oven to 350~F. Combine baking mix and 1/2 c cold water; stir until soft dough forms. Press dough into bottom of greased 13x9" baking dish. Cook ground beef in large nonstick skillet until brown. Stir in taco seasoning mix (dry) and 1 c water. Bring to a boil; reduce heat and simmer 15 minutes, stirring occasionally. Spoon mixture over dough. Combine spinach, ricotta cheese and onions; spread over ground beef mixture. Combine Cheddar cheese, sour cream and egg; spoon evenly over spinach mixture. Bake 30 minutes or until set. Let stand 5 minutes before serving.