Sunny's Currywurst with Quick-Pickled Peppers and Onions and Sunny's Curry Ketchup

• 6 links fresh, pork bratwurst
• 4 cups your favorite beer, such as Corona
• 1 tablespoon liquid smoke
• 2 teaspoons red pepper flakes
• 1/2 teaspoon whole black peppercorns
• 2 cloves garlic, smashed
• 1 medium red onion, halved and sliced
• 1 green bell pepper, seeded, halved and sliced
• 1 red bell pepper, seeded, halved and sliced
• 1 yellow bell pepper, seeded, halved and sliced
• Kosher salt
• Vegetable oil, for brushing
• 3/4 cup sugar
• 3/4 cup apple cider vinegar
• 6 hot dog buns, demi-baguettes or any bratwurst-length crusty bread, sliced like hot dog buns
• Sunny's Curry Ketchup, for serving, recipe follows

Sunny's Curry Ketchup:

• 3 pounds Roma tomatoes, quartered (10 to 12 tomatoes)
• 4 cloves garlic, smashed
• 1 medium red onion, quartered
• One 3-inch-long cinnamon stick
• One 1/4-inch-thick disc fresh ginger
• 1 star anise pod
• 1 cup sugar
• 1/4 cup mild yellow curry powder
• 1/2 teaspoon ground allspice
• 1/4 teaspoon whole black peppercorns
• Kosher salt
• 1/4 cup light corn syrup
• 2 tablespoons apple cider vinegar, plus more if needed