Ingredients

• 1 jalapeño
• 1 large egg yolk
• 2 teaspoons fresh lime juice
• 1 teaspoon Dijon mustard
• 1 cup grapeseed oil
• Salt, pepper
• Lime juice

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Instructions

1. Grill 1 jalapeño, turning often, over medium-high heat until charred and blistered, about 5 minutes. Let cool. Peel, remove seeds if desired, and finely chop. Whisk together 1 large egg yolk, 2 teaspoons fresh lime juice, and 1 teaspoon Dijon mustard. Whisking constantly, slowly drizzle in 1 cup grapeseed oil, drop by drop at first, until mayonnaise is thickened and smooth. Add jalapeño; season with salt, pepper, and more lime juice, if desired.