diabetic philly cheesesteak peppers

Ingredients For diabetic philly cheesesteak peppers

• 1 Tbsp

  canola oil
• 1 Tbsp

  margarine
• 1 c

  thinly sliced onion
• 1 1/2 c

  sliced mushrooms
• 2 tsp

  minced garlic
• 1/4 tsp

  salt
• 1/4 tsp

  black pepper
• 4 slice

  low-salt deli roast beef, cut into 1/2-inch strips
• 4 slice

  mozzarella cheese, cut in half
• 2 lg

  green bell peppers, sliced in half, seeds removed