Toss the zucchini, squash, onions, peppers, tomatoes & garlic with olive oil, salt & pepper.
Roast the veggies, then add the halloumi and continue roasting in the oven until the cheese is golden.
Make the herby & garlicky lemon parsley sauce.
It's similar to pesto.
Spoon the sauce on the roasted veggies & halloumi.
Serve with rice, barley or your favorite grains.