Preheat oven to 350º F/180º C.
Chop the zucchini and squash in half and then chop them into 1/2 inch chunks. Chop the carrots thin, and slice the bell peppers thin. Cut the broccoli into small florets, and smash the garlic and peel.
Place all of the veggies and garlic into a large 1.5 or 2.5 quart baking dish with a lid. Pour over the olive oil, salt and pepper to taste (lean a little heavier on the salt as all of these vegetables will need it), and fresh oregano and thyme.
Place the lid on and give a good shake to help coat all of the veggies with the olive oil and seasoning.
Place in the oven for 25 minutes but set the timer for 15 minutes. Once 15 minutes have expired, grab both sides of the baking dish (thumbs over the lid to keep it in place) with oven mitts and shake to toss again.
Set back in the oven for an additional 5 minutes. Remove from the oven and add in the tomatoes and butter or ghee. Then place the lid back on, and shake to toss again. Place back in the oven for an additional 5 minutes.
Serve over a bed of rice or couscous, and salt and pepper to taste.