Cheesy Zucchini Black Bean Skillet - Meatless Monday

Ingredients

• 1 1/2 cups zucchini, quartered lengthwise and sliced
• 1/2 cup diced green bell pepper
• 1/4 teaspoon crushed red pepper
• 1/2 teaspoon salt, or to taste
• 1/4 to 1/3 cup vegetable stock*
• 1 can black beans, drained and rinsed
• 1 can (14.5 oz.) fire-roasted diced tomatoes, undrained
• 1 cup grated Cheddar cheese (or any good melting cheese)