In the bowl of a food processor, fitted with a metal blade, combine the egg, mustard, garlic and lemon juice. Season with salt and pepper. With the machine running, add the oil in a steady stream slowly until the mixture is pale in color and thick. Remove from the processor and refrigerate for at least one hour.
To assemble the Spicy Garlic Bread:
Preheat oven to 400. In a mixing bowl, combine the aioli, jalapenos, artichoke hearts and parmesan cheese. Mix well. Season with salt and pepper. Slice the bread in half lengthwise (if not already cut). Spread the mixture over each half of the bread. Place on a parchment lined baking sheet and bake until golden and bubbly. About 20-25 minutes. Remove from the oven and cool slightly before slicing.