Preheat oven to 375 degrees F.
Brush slices of baguette with 2 Tbsp. olive oil and season with salt and pepper.
Roast until slightly brown in color.
Season veggies with salt and pepper and drizzle with olive oil, grill until done on both sides.
Place on sheet tray to cool.
Chop up all grilled items and mix together with 1 Tbsp. olive oil, and mozzarella cheese.
Top each crostini with 1 Tbsp. Tomato and basil sauce and a heaping spoon full of veggies mix.
Place on sheet tray and bake in oven until cheese is melted.