1. Place 1 tortilla on cutting board and spread 1/4 cup hummus in an even layer. Arrange turkey slices over bottom two-thirds of tortilla. Lay peppers over hummus. Scatter spinach over peppers.
2. Starting from bottom, roll tightly. Wrap securely in plastic. Repeat with remaining ingredients.
3. Refrigerate sandwiches for 30 minutes before unwrapping and cutting into quarters.