Rosemary Roasted Root Vegetables

Ingredients:
1 lb. new baby potatoes, or sweet potatoes, or a combination of each, chopped into 1 inch pieces
4 medium carrots, peeled and chopped into 1 inch pieces
2 medium-large parsnips, peeled & chopped into 1 inch pieces
3 small red onions, peeled and quartered
1 large fennel bulb, sliced
2 Tbsps olive oil, or avocado oil
5 sprigs fresh rosemary, chopped
6 cloves fresh garlic, minced
1 tsp sea salt, or to taste
freshly ground black pepper, to taste