On a skillet over med-high heat sauté spinach, garlic, salt and pepper in canola oil until wilted; about 1-2 minutes.

In a large bowl, stir together spinach mixture, bread, onions, cheese and cold cuts. Spread into a greased 8" (2L) baking dish.

In a bowl, whisk eggs with milk and Dijon. Pour over bread mixture and let stand for minimum of 20 minutes or up to 24 hours.

Bake in 375ºF oven for 45 minutes until puffed and golden.