Prep the hearty veggies: Add carrots, potatoes, sweet potatoes (or squash), and onion to the slow cooker. These take longer to soften and should go in first.
Season well: Drizzle with olive oil.
Add garlic, salt, pepper, Italian seasoning, and smoked paprika if using. Toss to coat everything evenly.
Add liquid: Pour in the vegetable broth. This helps create steam and prevents sticking without making the vegetables soggy.
Start the cook: Cover and cook on Low for 4 hours or on High for 2 to 2.5 hours.
You’re aiming for the root vegetables to be just tender when pierced with a fork.
Add quick-cooking vegetables: Stir in bell pepper, broccoli, and green beans. Replace the lid and continue cooking for 45 to 75 minutes on Low (or 30 to 45 minutes on High), until crisp-tender.
Finish and brighten: Stir in lemon juice and taste. Add a pinch more salt and pepper if needed.
Sprinkle with fresh herbs before serving.
Serve: Enjoy as a side, or turn into a main by serving over quinoa, rice, or couscous with a drizzle of olive oil or a spoonful of pesto.