Preheat your oven to 400°F and line a baking sheet with parchment paper for easy cleanup.
Pat the chicken thighs dry with a paper towel and place them in a bowl with olive oil, oregano, thyme, garlic powder, salt, and pepper.
Toss the chicken until evenly coated, then arrange on the prepared baking sheet and roast for 20 to 25 minutes until the internal temperature reaches 165°F.
While the chicken roasts, combine the white rice and chicken broth in a small saucepan over high heat.
Bring the broth to a boil, then reduce heat to low, cover, and simmer for 15 minutes until the liquid is absorbed.
During the last 10 minutes of chicken roasting, place the asparagus spears on the same baking sheet to tenderize.
Remove the rice from heat, stir in the lemon juice, and fluff with a fork before serving alongside the herb-roasted chicken and asparagus.