Tempura Garlic Scapes with Garlic Scape Aioli

Name: Tempura Garlic Scapes with Garlic Scape Aioli
Ingredients: Tempura Garlic Scapes; 1 pound garlic scapes; 3 1/2 cups canola oil for deep frying; 2 egg yolks; 2 cups ice water; 1/4 cup ice cubes; 2 cups flour, cake or all-purpose; Garlic Scape Aioli; 4 or 5 garlic scapes, straggly tips removed; Kosher salt; 1 tablespoon capers; 1 egg yolk; 1 lemon; Crushed red pepper flakes; 1/2 cup olive oil; 1/2 cup neutral oil such as grapeseed, canola, or vegetable; 1 tablespoon vinegar (optional)