Beat baking mix, milk, eggs, and salt with hand beater until smooth.
Stir in broccoli and 1 cup of the cheese.
Pour mixture into a 5-1/2-cup souffle dish or a 1-1/2-quart casserole that has been buttered.
Bake, uncovered, at 325 degrees until knife inserted halfway between center and edge comes out clean--about 1 hour. Top with remaining 1/4 cup cheese and return to oven for 5 minutes, or until cheese is melted. Serve immediately.
May substitute 2 (10 oz. ea.) packages frozen corn or frozen spinach for the broccoli.