Cut the top third off the head of garlic. Place the garlic on a square of aluminum foil and drizzle lightly with 1 teaspoon olive oil. Wrap the foil tightly around the garlic and transfer to the oven. Roast until the cloves are very tender when pierced with a fork, about 45 minutes to 1 hour. When the garlic is cool enough to handle, squeeze the soft garlic pulp from 4 of the cloves into the bowl of a food processor. Save the remaining garlic pulp for another use.
Guacamole:
Add remaining ingredients to the bowl with the garlic and process until smooth, occasionally scraping down the sides of processor. Slowly pour in remaining olive oil; season with salt and crushed red pepper.
Shrimp:
Heat a large pan over high heat. In a large bowl, toss the shrimp with 2 tablespoons olive oil and ¼ teaspoon each salt and paprika. Cook, turning occasionally, until pink, 3 to 4 minutes.
Tacos:
Using a circular cookie cutter or a mason jar lid, cut the tortillas into small circles.
Place tortillas over open flame or large non-stick skillet and cook for 15-20 seconds on each side or until slightly charred.
Spread some of the guacamole cream on each tortilla. Top with the shrimp and garnish with fresh chives.