It's Fall. Winter squash should be well priced right now. Cut lengthwise, and lay on a pan cut side down. Bake at 350 for 1 - 1.5 hours until the shell dents easily when poked.clean the flesh from the skin, and mash with oil, salt, and flavor (can include herbs, aromatics, spices, or anything else). Thyme and garlic are good.
Most vegetables are good roasted. Cut them down to about 1" wide if necessary, toss in oil, salt, and flavor, and roast at 450 for 20 - 60 minutes depending on the vegetable. Make sure not to crowd the pan. If it won't fit in a single layer, then use a larger pan.
Sichuan green beans are wonderful. Use either fresh or thawed and drained frozen green beans. Heat about 1/4 cup peanut oil in a large skillet or wok over high heat. Once shimmering add the green beans. Keep them constantly moving so that they cook evenly. Cook for about five to seven minutes until the outsides blister. Add red chiles if you like it spicy, some minced garlic, and fresh ground pepper (Sichuan if available). Cook about a minute. Add a touch of sesame oil and soy sauce. Cook another minute, then serve.
Many Indian dishes are vegetarian, and can be made vegan very easily.