Green Goddess Salad

Name: Green Goddess Salad
Ingredients: 2 c. loosely packed baby spinach (about 2 ounces); 1/2 c. fresh basil leaves; 1/2 c. fresh parsley leaves; 1/4 c. grated parmesan cheese (about 1 ounce); 1 1/2 tsp. kosher salt, plus more to taste; 1 tsp. ground black pepper; 2 garlic cloves; 1 avocado; 1 shallot, quartered; 5 tbsp. fresh lemon juice (from about 2 lemons); 1/4 c. olive oil; 8 oz. sugar snap peas, sliced on the diagonal into 1/4-inch pieces; 4 green onions, thinly sliced; 1 English cucumber, finely chopped (about 2 cups); 1/2 head green cabbage, finely chopped (about 4 cups); 1/2 tsp. kosher salt