Prepare the Noodles
Start by cooking the udon noodles according to the package instructions. Most udon noodles cook in boiling water in just a few minutes. Once done, drain the noodles, rinse them under cold water to stop the cooking process, and set them aside.
Cook the Beef and Bell Peppers
Heat a skillet or wok over medium-high heat. Add the ground beef and cook until it begins to brown, breaking it apart with a spoon or spatula. Once the beef is halfway cooked, add the diced bell peppers. Cook for another 2-3 minutes, allowing the peppers to soften slightly while retaining their crunch.
Add the Sauce
Lower the heat to medium and stir in the sweet chili sauce and soy sauce. Mix thoroughly, ensuring the beef and peppers are evenly coated with the glaze.
Combine with Noodles
Add the cooked udon noodles to the skillet. Toss everything together until the noodles are fully coated in the sauce and heated through. This step ensures the flavors meld perfectly.
Serve Warm
Transfer the noodles to a serving plate or bowl. For a finishing touch, garnish with chopped cilantro for added freshness and aroma.