Brown the Beef: Heat a tablespoon of oil in a skillet over medium-high heat; add ground beef and cook 5 minutes, breaking it up until no pink remains and edges turn golden.

Sauté Aromatics: Add minced garlic and diced onion; stir for 1–2 minutes until fragrant and translucent.

Stir in Veggies: Toss in bell peppers, carrots, and broccoli florets; cook 3–4 minutes until veggies are bright and tender-crisp.

Add Broth & Sauce: Pour in beef broth, soy sauce, and sesame oil; bring to a gentle simmer for 2 minutes.

Cook Noodles: Gently fold in egg noodles; cover and cook 4–5 minutes until noodles absorb the sauce and are tender.

Season to Taste: Taste and adjust with extra soy sauce, red pepper flakes, or sesame oil.

Plate & Serve: Transfer noodles to bowls; garnish with sliced green onions and toasted sesame seeds.