For the sweet and spicy marinade: Put the olive oil, cilantro, honey, lime juice, thyme, garlic, jalapenos, 1 teaspoon salt and 1 teaspoon pepper in a food processor and pulse to puree. Transfer the mixture to a nonreactive container, add the shrimp and toss to combine. Cover and refrigerate for at least 30 minutes and up to 2 hours before cooking
For the peppers and onions: Heat a cast-iron pan over medium-high heat until hot. Toss the peppers and onions in a bowl with the olive oil, lime juice and 1 teaspoon salt. Add the pepper-onion mixture to the hot pan and cook, stirring occasionally, until the vegetables are tender and the edges are charred, 8 to 10 minutes. Set aside.
Prepare a grill for medium-high heat and brush the grill grates with oil.
Grill the shrimp until cooked through, about 2 minutes per side.
Serve with the warm tortillas and toppings.
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