Power Greens Matzo Ball Soup

Name: Power Greens Matzo Ball Soup
Ingredients: * 3 egg; * 1/2 cup vegetable stock; * 1 cup matzah meal; * 1/4 cup grated onion; * 2 tbsp olive oil; * 1/4 tsp salt; * 1/4 tsp pepper; * for soup:; * 4 tbsp butter (can use margarine, but butter preferred); * 1 medium white onion, diced; * 3 clove garlic, minced; * 1 medium russet potato (about 1 pound), washed peeled and small diced; * 1/2 bunch asparagus top and stem, chopped; * 1 cup spinach, rough chopped; * 1 cup arugula; * 1/4 bunch parsley, chopped; * 4 cup vegetable broth; * juice from 1/2 lemon; * 1 tsp ground cumin; * kosher salt and fresh cracked black pepper to taste