Chilled Summer Vegetable Chili

Name: Chilled Summer Vegetable Chili
Ingredients: 2 tablespoons olive oil; 1 large red onion, diced; 5 cloves garlic, minced; 2 tablespoons chili powder, or more to taste; 1 tablespoon cumin powder; 2 large ears sweet yellow corn, kernels removed; 1 large zucchini, medium diced; 2 cups white mushrooms, sliced; 1 can, 15 ounces, cannellini beans, drained and rinsed; 1 large can, 28 ounces, diced tomatoes; 1 cup filtered water; salt & pepper to taste; 1 cup cilantro, roughly chopped; 1.5 avocados, peeled, pitted, and sliced