Before starting, wash and dry all produce. Thinly slice jalapeño into rounds, removing seeds for less heat. (TIP: We suggest using gloves when prepping jalapeños!)Add jalapeños, vinegar, 2 tbsp (4 tbsp) water and 1 tsp (2 tsp) sugar to a small pot. Season with salt. Bring to a simmer over medium-high heat. Once simmering, cook, stirring often, until sugar dissolves, 1-2 min. Remove the pot from heat. Transfer jalapeños, including liquid, to a medium bowl. Place in the fridge to cool.

Peel, then finely chop shallot.Cut corn in half crosswise. Quarter tomatoes. Thinly slice green onions.Zest, then juice half the lime (whole lime for 4 ppl). Cut any remaining lime into wedges. Add tomatoes, shallots, half the lime zest, half the green onions, 2 tsp (4 tsp) lime juice and 1 tbsp (2 tbsp) oil to a small bowl. Season with salt and pepper, then stir to combine.

On a separate cutting board, cut bacon crosswise into 1/4-inch strips.Heat a large non-stick pan over medium heat. When hot, add bacon. Cook, stirring occasionally, until crispy, 5-7 min.** Remove the pan from heat. Using a slotted spoon, transfer bacon to a paper towel-lined plate. Set aside.Carefully drain and discard all but 1 tbsp (2 tbsp) fat from the pan.

Meanwhile, add corn and enough water to cover (by approx. 1-2 inches) to a large pot (use same for 4 ppl). Season with salt.Cover and bring to a boil over high heat, 3-4 min.Once boiling, remove the pot from heat and set aside, still covered. Wrap tortillas in paper towels. Microwave until tortillas are warm and flexible, 1 min. (TIP: You can skip this step if you don't want to warm the tortillas!)

Heat the pan with reserved bacon fat over medium-high.When hot, add beef. Cook, breaking up beef into smaller pieces, until no pink remains, 4-5 min.**Add Mexican Seasoning. Cook, stirring often, until fragrant, 1 min. Season with salt and pepper, to taste.Remove the pan from heat.

Drain pickled jalapeños and discard liquid.Brush each corn cob half with 1/2 tbsp butter and season with salt.Divide corn and tortillas between plates. Top tortillas with beef, bacon, pickled jalapeños, salsa and guacamole.Sprinkle remaining lime zest and remaining green onions over corn.