How to Make It
Preheat oven to 425°.
Arrange bread on a baking sheet; coat with cooking spray. Bake at 425° for 6 minutes. Place in a bowl. Add cheese; toss well.
Heat a Dutch oven over medium heat. Add oil, onion, and garlic; cook 11 minutes. Stir in stock, peas, 3 tablespoons mint, and sugar. Bring to a boil. Reduce heat; simmer 20 minutes.
Place half of pea mixture and remaining mint in a blender. Remove center piece of lid; secure lid on blender. Place a towel over lid. Blend until smooth; pour into a bowl. Repeat with remaining mixture. Return soup to pan. Add yogurt, rind, pepper, and salt. Top with croutons.