Preheat oven to 400 degrees.
Place prepped zucchini, portabellas, onions, and peppers on a baking sheet. Brush with olive oil and sprinkle with salt and pepper. Move the baking sheet to the oven and bake for about 5-7 minutes. Just enough to soften the veggies, but not turn them to mush.
While they are cooking, quarter your artichoke hearts.
Now add your spread ingredients to a bowl and mix well.
When the veggies are done roasting, remove them from the oven and allow them to cool slightly before assembling your sandwich.
Spread your bread with the spread, then start layering on the veggies.