Ziti With Ratatouille Sauce

• 12 ziti
• 5 garlic (cloves minced)
• 5 larg
• 2 zucchini (cut into)
• 2 japanese eggplants crosswise (cut into)
• 1 bell pepper (red cut into)
• 1 green bell pepper (diced)
• 1 sweet potato (peeled)
• 1 onion coarsely (chopped)
• 1/2 ch