Preheat the oven to 350°F.
Slice off the top third of each acorn squash, deseed and coat the inside of the squash with olive oil and season with the all-purpose spice blend. Transfer the squash bowls and lids to a rimmed baking sheet. Bake for 20 to 25 minutes, or until the squash is tender. Increase the oven temperature to 425°F.
Meanwhile, on a large rimmed baking sheet, toss the eggplant and mushrooms with 2 tablespoons of olive oil. Roast for about 15 minutes, or until beginning to brown in spots.
In a large pot, heat 2 tablespoons of olive oil. Sauté the onions and peppers over moderate heat, stirring occasionally, until softened. Add the tomato, chili seasoning and roasted vegetables and simmer, stirring occasionally, until the tomatoes break down. Stir in the garbanzo beans and reduce the heat to low. Simmer for at least 15 minutes, stirring occasionally, until you have a thick stew.
Scoop the chili into the acorn squash bowls. Garnish with a dollop of mango chutney and microgreens, if using. Enjoy!