1️⃣ Prepare the Pasta: Cook 3 cups of rotini pasta according to the package directions. Once cooked, drain well and set aside. 🍲

2️⃣ Cook the Meat: In a medium skillet over medium-high heat, add the ground beef. Break the beef apart with a spatula. Add the diced onion, minced garlic, and Italian seasoning. Cook, stirring frequently, until the beef is thoroughly browned. Drain any excess grease from the skillet. 🍳

3️⃣ Preheat the Oven: Set your oven to 350°F (180ºC) to preheat. 🔥

4️⃣ Combine Ingredients: In a large mixing bowl, combine the pizza sauce and water. Stir in the cooked pasta, browned ground beef, half of the mozzarella cheese, and half of the pepperoni. Mix everything together until well combined. 🥄

5️⃣ Assemble the Casserole: Spray a baking dish with cooking spray. Transfer the pasta and meat mixture to the baking dish. Evenly sprinkle the remaining mozzarella cheese and pepperoni on top. 🧀

6️⃣ Bake: Cover the dish with aluminum foil and bake in the preheated oven for 20 minutes. Remove the foil and continue baking for an additional 10-15 minutes, or until the cheese on top is melted and bubbly. 🧀🔥