Heat olive oil in a large skillet over medium-high heat until shimmering.
Add chicken pieces to the skillet and season with salt, black pepper, and dried oregano.
Sauté chicken for 5 to 7 minutes, stirring occasionally, until browned on all sides and cooked through.
Add minced garlic and cook for 60 seconds until fragrant.
Toss in the asparagus pieces and pour in the chicken broth.
Cover the skillet with a lid and steam for 3 to 4 minutes until the asparagus is tender-crisp and bright green.
Remove the lid and stir in the lemon juice and red pepper flakes.
Cook for an additional 1 to 2 minutes to allow the sauce to reduce slightly and coat the chicken.
Remove from heat and serve immediately.