1. Preheat oven to 350°.
2. Heat a large nonstick skillet over medium-high heat. Coat pan with cooking spray. Add onion and garlic to pan; sauté 5 minutes or until golden. Set aside.
3. Place hominy in a food processor; process 1 minute or until finely ground.
4. Combine cheeses in a large bowl; beat with a mixer at medium speed until smooth. Add milk, egg substitute, and eggs; beat well. Add hominy, sugar, hot sauce, salt, and pepper; stir well. Stir in onion mixture. Pour mixture into a 13 x 9–inch baking dish coated with cooking spray. Bake at 350° for 1 hour or until set.