Overnight FedEx-Inspired Breakfast Casserole with Sweet Potatoes and Sausage

By Lauren Mitchell, Test Kitchen Director · Reviewed by AislePrompt Editorial · Published 2026-04-30 · Updated 2026-04-30

A hearty baked breakfast casserole featuring roasted sweet potatoes, savory sausage, and a custard of eggs and cheese, perfect for a make-ahead morning meal. This american-inspired breakfast ready in about 70 minutes combines sweet potato, Italian sausage, large eggs into a breakfast that fuels the morning without the midday crash — make-ahead-friendly and balanced enough to anchor the first meal of the day. Each serving lands at about 320 calories and feeds 6, so it sits comfortably in a weekly breakfast rotation alongside fruit, yogurt, or coffee. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Ingredients

• 2 cups diced (about 1 medium) sweet potato
• 1/2 lb, casing removed Italian sausage
• 8 large eggs
• 1 cup whole milk
• 1 cup shredded sharp cheddar cheese
• 1/2 cup diced onion
• 2 minced garlic cloves
• 1 tsp salt
• 1/2 tsp black pepper
• 1 tbsp olive oil
• 2 tbsp chopped fresh parsley

Instructions

1. Step 1: Preheat oven to 400°F. Toss 2 cups diced sweet potato with 1 tbsp olive oil and 1/4 tsp salt, spread on a baking sheet and roast for 20 minutes until tender and edges caramelized.
2. Step 2: While sweet potatoes roast, heat a skillet over medium heat. Add 1/2 lb Italian sausage, breaking it apart and cooking for 5-7 minutes until browned and cooked through. Add 1/2 cup diced onion and 2 minced garlic cloves to the sausage; sauté for 3 minutes until onion is translucent and fragrant.
3. Step 3: In a large bowl, whisk 8 large eggs with 1 cup whole milk, 1 tsp salt, and 1/2 tsp black pepper until smooth. Stir in 1 cup shredded sharp cheddar cheese, roasted sweet potatoes, cooked sausage mixture, and 2 tbsp chopped fresh parsley.
4. Step 4: Pour the mixture into a greased 9x13-inch baking dish and bake at 350°F for 35-40 minutes until the casserole is set and golden on top. Let cool 5 minutes before serving.