Acorn squash stuffed with beans and chard

Name: Acorn squash stuffed with beans and chard
Ingredients: 2 acorn squash; 2 cups onion chopped; 2 garlic cloves; 3 tablespoons oil; 2 tablespoons tomato paste; 1 teaspoon coriander powder; 1 teaspoon cumin powder; 8 cups swiss chard leaves, chopped; 3 1/2 cups white beans ( eg cannelini); 3 tablespoons kalamata olives, chopped; half cup breadcrumbs ( regular or panko); half cup grated fresh parmesan cheese; 4 tablespoons chopped fresh parsley or cilantro; 2 tablespoons pine nuts; 1 teaspoon chili flakes - or more, to taste; half teaspoon salt; half teaspoon pepper