Place three halved peppers in a 9- x 13-inch baking pan and pour boiling water over them, enough to cover. Cover with plastic wrap and set aside.
Heat evoo in a small sauté pan over medium-high heat. Add onions, the finely chopped pepper, squash, and black beans. Cook for 5 minutes, stirring occasionally and lightly mashing the beans. Remove from heat.
Drain the peppers and fill them with the vegetable stuffing. Place stuffed peppers back in the baking pan. Bake for 20 to 25 minutes.
Serve topped with cilantro.
Recipe courtesy of Quick & Kosher: Meals in Minutes by Jamie Geller (Feldheim 2010).