Place tomatoes, onion, vinegars, sugar, salt, red pepper, coriander, and ginger into a medium saucepan over medium heat. Simmer for 40 minutes.
Cool, cover, and refrigerate for 3 weeks.
Tomato chutney pizza: Spread chutney over pizza dough. Top with shredded chicken or meat, and a ¼ cup chopped basil. Bake in 450°F oven for 20 minutes. Drizzle with garlic mayonnaise. Top with baby arugula and pickled red onions.