Filling:

2 tablespoons olive oil, divided
2 cups diced peeled baking potato (8 ounces)
1 1/4 cups diced carrot (3 carrots)
1 cup diced parsnip (2 parsnips)
3/4 cup chopped celery (3 stalks)
2 (8-ounce) packages presliced cremini mushrooms
1/4 teaspoon salt
1/2 teaspoon freshly ground black pepper
2 garlic cloves, minced
Cooking spray
2 1/2 tablespoons all-purpose flour
1 1/2 cups 1% low-fat milk
3/4 cup organic vegetable broth
2 cups frozen petite green peas
1 1/2 tablespoons chopped fresh thyme
1 (16-ounce) package frozen pearl onions

Biscuit topping:
7.5 ounces all-purpose flour (about 1 2/3 cups)
1 1/2 teaspoons baking powder
3/4 teaspoon baking soda
1/8 teaspoon salt
1 teaspoon freshly ground black pepper
4 1/2 tablespoons unsalted butter, cut into pieces
2 ounces grated fresh Parmesan cheese (about 1/2 cup)
3 tablespoons chopped fresh chives
1 cup low-fat buttermilk

2 tablespoons olive oil, divided 2 cup s diced peeled baking potato (8 ounces) 1 1/4 cups diced carrot (3 carrots) 1 cup diced parsnip (2 parsnips) 3/4 cup chopped celery (3 stalks) 2 (8-ounce) packages presliced cremini mushrooms 1/4 teaspoon salt 1/2 teaspoon freshly ground black pepper 2 garlic cloves, minced 2 1/2 tablespoons all-purpose flour 1 1/2 cups 1% low-fat milk 3/4 cup organic vegetable broth 2 cup s frozen petite green peas 1 1/2 tablespoons chopped fresh thyme 1 (16-ounce) package frozen pearl onions 7 5 ounces all-purpose flour (about 1 2/3 cups) 1 1/2 teaspoons baking powder 3/4 teaspoon baking soda 1/8 teaspoon salt 1 teaspoon freshly ground black pepper 4 1/2 tablespoons unsalted butter, cut into pieces 2 ounces grated fresh Parmesan cheese (about 1/2 cup) 3 tablespoons chopped fresh chives 1 cup low-fat buttermilk

1. To prepare filling, heat a large nonstick skillet over medium-high heat. Add 1 1/2 teaspoons oil to pan; swirl to coat. Add potato and next 6 ingredients (through black pepper); sauté 5 minutes. Add garlic; sauté 1 minute. Coat a 5-quart electric slow cooker with cooking spray. Transfer vegetable mixture to slow cooker.

2. Heat remaining 1 1/2 tablespoons oil in pan over medium-high heat. Add 2 1/2 tablespoons flour, stirring with a whisk. Cook 1 minute, whisking constantly. Gradually add milk and broth, stirring with a whisk. Cook over medium heat 3 minutes or until thick and bubbly, stirring constantly with whisk. Pour sauce into slow cooker. Stir in peas, thyme, and onions. Cover and cook on LOW for 3 1/2 hours or until vegetables are tender.

3. To make biscuit topping, weigh or lightly spoon 7.5 ounces flour into dry measuring cups; level with a knife. Combine flour, baking powder, and next 3 ingredients (through black pepper) in a large bowl, stirring with a whisk. Cut in butter with a pastry blender or 2 knives until mixture resembles coarse meal. Stir in cheese and chives. Add buttermilk, stirring just until moist.

4. Increase slow cooker heat to HIGH. Drop biscuits onto filling in 8 equal mounds. Cover and cook on HIGH for 1 hour and 15 minutes or until biscuits are done. Uncover and let stand 5 minutes before serving.