In a bowl, toss together broccoli, cauliflower, oil, garlic, 1 tsp (5 mL) of the thyme and half each of the salt and pepper. Spread onto parchment paper lined baking sheet. Roast in preheated 400 F (200 C) oven for about 20 minutes or until golden brown.
Whisk together eggs, milk, flour and remaining thyme, salt and pepper.
Spread roasted vegetables into bottom of sprayed 9 inch (23 cm) pie plate. Pour egg mixture over top and sprinkle with cheese.
Bake in preheated 375 F (190 C) oven for about 25 minutes or until knife inserted in centre comes out clean.