Chu-Argentinean Sandwiches-Photo1

The-Growing-Gourmand-14-Reasons-why-Your-Kid-Should-Learn-How-to-Cook-photo7HOMEMADE MAYONNAISE
Makes: About 1 cup

Ingredients
1 egg yolk, at room temperature
2 TSP freshly squeezed lemon juice
1 TSP yellow or Dijon mustard
¼ TSP salt
¾ cup neutral oil such as grapeseed or canola