Cheesy Vegetable Chowder

Name: Cheesy Vegetable Chowder
Ingredients: 12 (3/4-ounce) slices Land O Lakes® Deli American Cheese; 6 (3/4-ounce) slices Land O Lakes® Deli Swiss Cheese; 3 tablespoons Land O Lakes® Butter; 1 large (1 cup) onion, sliced; 1/4 cup all-purpose flour; 5 cups Land O Lakes® Half & Half; 2 medium (1 1/2 cups) carrots, thinly sliced; 1 rib (3/4 cup) celery, thinly sliced; 1 (14-ounce) package frozen Brussels sprouts, thawed, cut in half; 1 (10-ounce) package frozen chopped spinach, thawed, well-drained; 4 teaspoons instant chicken bouillion; 2 teaspoons ground mustard; 2 teaspoons salt; 1/4 teaspoon garlic powder; 1/4 teaspoon ground nutmeg; 1/8 teaspoon pepper