Season the chicken thighs with salt, pepper, thyme, and paprika.
Heat olive oil in a skillet over medium heat.
Sear the thighs skin-side down for 5-7 minutes until golden brown.
Remove the thighs and place them in the slow cooker.
Add sliced onion and minced garlic to the skillet; sauté for 2-3 minutes.
Pour the sautéed mixture over the chicken in the slow cooker.
Add chicken broth and mixed vegetables around the chicken.
Cover and cook on low for 6-8 hours or high for 4-6 hours.
Check the internal temperature of the chicken; it should reach 165°F (75°C).
Serve hot with your favorite sides.