Easy Whole30 Chili

Name: Easy Whole30 Chili
Ingredients: 1 large yellow onion; 1 medium red bell pepper; 1 medium green bell pepper; 3 cloves garlic; 1 tablespoon olive oil; 1 pound lean ground beef; 2 teaspoons kosher salt, divided; 2 tablespoons tomato paste; 2 tablespoons chili powder; 1 tablespoon ground cumin; 1 tablespoon unsweetened natural cocoa powder; 2 teaspoons dried oregano; 1/4 teaspoon freshly ground black pepper; 1 (15-ounce) can fire-roasted diced tomatoes; 1 1/2 cups low-sodium beef broth or water; 1 tablespoon apple cider vinegar; 1 medium avocado, diced; 2 medium scallions, thinly sliced; 1/2 cup coarsely chopped fresh cilantro