Step 1

Heat oil in a large,nonstick skillet set over medium-high heat. Crumble in ground beef; season with steak spice.

Step 2

Cook,breaking up into small pieces,for 5 to 7 minutes or until browned.

Step 3

Add onion,green pepper and mushrooms. Cook,stirring occasionally,for 5 to 7 minutes or until vegetables are tender-crisp.

Step 4

Stir in tomatoes,soup and mustard. Reduce heat to medium-low. Simmer for 5 minutes or until slightly thickened.

Step 5

Stir in cooked macaroni and 1 cup (250 mL) cheese until well combined.

Step 6

Sprinkle the top with remaining cheese and green onion.

Step 7

Cover and remove from heat. Let stand for 5 minutes or until cheese is melted.