In large bowl add 1/4 cup olive oil and 1 tbsp minced garlic.
Cut peppers and onions into large flat pieces(big enough to grill without falling through the grates. Add to bowl with olive oil and garlic. Mix well until peppers and onions are well coated. Marinate for 1 hour.
Remove peppers and onions from bowl but save remaining olive oil and garlic in bowl. You will assemble salad in this same bowl.
Cut 1/2 baguette lengthwise. Brush entire surface of baguette with some of the oil and garlic mix remaining in bowl.
Grill peppers and onions. Watch carefully, flip as first side begins to char. Remove after both sides have charred some and they are mostly cooked through. Cut into large bite size pieces.
Grill cut baguette as well. Flip after first side begins to brown. Remove and dice into crouton size pieces
Add remaining olive oil, vinegar and some salt and pepper to mixture in bowl. Stir.
Add all ingredients to large bowl, grilled veggies and onions, tomatoes, cheese, bread, and basil. Mix well, serve immediately.