Mashed Potato and Veggie Strata

Ingredients

• 1 1/4 lbs. <a href="https://www.potatogoodness.com/russet-potatoes/">russet potatoes</a>, peeled and cut up
• 1/2 cup bottled roasted red sweet peppers
• 1 8-oz. carton sour cream*
• 1 tablespoon pre-prepared basil pesto*
• 1/4 teaspoon salt
• 2 medium zucchini, halved lenghtwise, sliced
• 1 medium yellow summer squash, halved lengthwise and sliced
• 1 medium sweet red pepper, chopped
• 1 medium sweet yellow pepper, chopped
• 1 medium sweet green pepper, chopped
• 1 medium onion, chopped (1/2 cup)
• 1 tablespoon olive oil
• 1/2 teaspoon salt
• 8 oz cheddar cheese, shredded*