Queso Fundido with Squash and Zucchini

Name: Queso Fundido with Squash and Zucchini
Ingredients: 1 tablespoon olive oil; 1/2 yellow onion, thinly sliced; 1 bottleneck yellow squash, ends trimmed and thinly sliced; 1 zucchini, ends trimmed and thinly sliced; Sea salt; 2 teaspoons hot sauce; 1 cup (4 ounces) mozzarella, shredded; 1 cup (4 ounces) Monterey Jack, shredded; Cilantro, for garnish; Tortilla chips or soft tortillas, for serving