Mushroom Cheddar Soup

Ingredients

• sliced baby portabella mushrooms
• 1 cup yellow onion, peeled, sliced
• 1 tablespoon garlic, peeled, minced
• 1 tablespoon vegetable oil
• 1/4 teaspoon salt
• 1/4 teaspoon pepper
• 1/4 cup butter
• 1/4 cup flour
• 2 cups low-sodium chicken broth
• 2 cups whole milk
• 2 cups shredded cheddar