Impossible Broccoli Pie
["2 pkg. frozen broccoli", "3 c. shredded Cheddar cheese (12 oz.)", "2/3 c. chopped onion", "1 1/3 c. milk", "3 eggs", "3/4 c. buttermilk baking mix", "3/4 tsp. salt", "1/4 tsp. pepper"]
["Heat oven to 400\u00b0.", "Grease a 10 x 1 1/2-inch pie plate.", "Rinse broccoli under cold water to thaw; drain thoroughly.", "Mix broccoli, 2 cups cheese and onion in plate.", "Beat milk, eggs, baking mix, salt and pepper until smooth (15 seconds in blender on high or 1 minute with hand beater).", "Pour into plate.", "Bake until knife inserted comes out clean, 25 to 35 minutes.", "Top with remaining cheese.", "Bake just until cheese is melted, 1 to 2 minutes longer.", "Let stand 5 minutes.", "Garnish with tomato slices. Makes 6 servings."]
["frozen broccoli", "Cheddar cheese", "onion", "milk", "eggs", "buttermilk baking mix", "salt", "pepper"]