Preheat oven to 350°F (175°C).

Boil macaroni in salted water until tender.

Drain macaroni and set aside.

In a separate pan, heat olive oil over medium heat.

Add chopped onions and bell pepper to the pan and sauté until softened.

Add ground beef to the pan and brown, breaking it up with a spoon.

Season ground beef with all-purpose seasoning.

In a saucepan over low heat, melt butter.

Add flour to the melted butter and whisk to form a paste (roux).

Slowly add milk and brown sugar to the roux, stirring constantly until the sauce thickens.

Add the cheese mix from the Kraft macaroni and cheese boxes to the sauce and stir until melted and smooth.

In a baking dish, layer cooked macaroni, followed by a layer of cooked ground beef.

Repeat layering macaroni and ground beef until all ingredients are used.

Pour the cheese sauce evenly over the macaroni and beef layers.

Use a fork to gently distribute the sauce throughout the dish.

Bake in the preheated oven for 30 minutes, or until golden brown and bubbly.