Anna Voloshyna's Vegetarian Ukrainian Borshch - California Prunes

Ingredients

• 3 TBSP unsalted butter
• 1 TBSP sunflower oil
• 1 medium yellow onion (finely chopped)
• 2 medium carrots (peeled and shredded)
• 1 medium tomato (diced)
• 4 medium Yukon Gold potatoes (peeled and cut into 1 ½-inch cubes)
• 2 medium red beets (peeled and cut into matchsticks)
• 1 small bell pepper (seeded and thinly sliced)
• 1 ½ cups chanterelle mushrooms (halved lengthwise)
• A handful of California Prunes (roughly chopped)
• 2 bay leaves
• salt and freshly ground black pepper
• ½ cup drained canned white beans (rinsed)
• 1 small head green cabbage (cored and shredded)
• 2 garlic cloves (minced)
• ¼ cup chopped fresh dill and flat-leaf parsley (in equal parts)
• sour cream (for serving)