Asparagus Orange Spinach Salad with Basil Lemon Vinaigrette

(packed) baby spinach

small bunch asparagus (12 stalks), hard stems removed and thinly sliced diagonally

large navel oranges, peeled and sliced *(see first note)

avocado, diced

walnuts, chopped

red onion, finely diced

extra virgin olive oil

lemon juice

fresh basil, finely chopped

Dijon mustard

small garlic clove

Salt,