Recipes and Cooking Caramelized Onion Breakfast Casserole 3.6 (41) This make-ahead brunch casserole is flavor-packed with fresh broccoli, gooey cheese, and sweet caramelized onions. By BHG Test Kitchen BHG Test Kitchen The Better Homes & Gardens Test Kitchen has been in continuous operation for nearly 100 years, developing and testing practical, reliable recipes that readers can enjoy at home. The Test Kitchen team includes culinary specialists, food stylists, registered and licensed nutritionists, and other experts with Bachelor of Science degrees in food science, food and nutrition, or culinary arts. Together, the team tests more than 2,500 recipes, produces more than 2,500 food images, and creates more than 1,000 food videos each year in the state-of-the-art test kitchen. Learn about BHG's Editorial Process Published on September 1, 2012 Print Rate It Share Share Tweet Pin Email Photo: Blaine Moats Prep Time: 30 mins Chill Time: 2 hrs Bake Time: 40 mins Stand Time: 10 mins Total Time: 3 hrs 20 mins Servings: 6 Jump to Nutrition Facts Ingredients 4 strips bacon 1 sweet onion, halved and thinly sliced 2 cup broccoli florets 5 eggs 1 ⅓ cup milk ½ teaspoon dried basil, crushed ¼ teaspoon salt ⅛ teaspoon ground black pepper 4 cup crusty sourdough bread, cut in 1/4-inch cubes 4 ounce Muenster or Swiss cheese, cut into 1/2-inch cubes Directions In a large skillet, cook bacon until crisp. Transfer bacon to plate lined with paper towels to drain, reserving 2 tablespoons drippings in the skillet. Crumble bacon; set aside. Add onion to skillet; cover and cook over medium-low heat for 15 minutes, stirring occasionally. Uncover and cook over medium heat until caramelized, about 5 minutes. Meanwhile, cook broccoli in a small amount of lightly salted water for 3 minutes; drain. In a large bowl combine eggs, milk, basil, salt and pepper. Stir in bread cubes, broccoli, caramelized onion, cheese, and crumbled bacon. Transfer to a 2-quart baking dish. Cover and chill for 2 hours. Preheat oven to 325°F. Bake casserole, covered, for 20 minutes. Uncover and bake 20 to 30 minutes more or until a knife inserted near center comes out clean. Let stand 10 minutes before serving. Make-Ahead Tip Prepare as directed. Cover and refrigerate up to 24 hours. To serve, preheat oven to 325°F. Bake casserole, covered, for 20 minutes. Uncover and bake 20 to 30 minutes more or until a knife inserted near center comes out clean. Let stand 10 minutes before serving. Rate it Print Nutrition Facts (per serving) 302 Calories 18g Fat 19g Carbs 17g Protein Show Full Nutrition Label Hide Full Nutrition Label Nutrition Facts Servings Per Recipe 6 Calories 302 % Daily Value * Total Fat 18g 23% Saturated Fat 8g 40% Cholesterol 188mg 63% Sodium 542mg 24% Total Carbohydrate 19g 7% Total Sugars 7g Protein 17g Vitamin C 24.2mg 121% Calcium 262.5mg 20% Iron 2mg 11% Potassium 359mg 8% Folate, total 84.7mcg Vitamin B-12 1mcg Vitamin B-6 0.3mg *The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.