Preheat oven to 400°. Invert a muffin tin upside down onto a large rimmed baking sheet.
Cut 8 slices of bacon in half crosswise. Lay two of the halved strips onto an inverted muffin tin cup in the shape of a cross. Weave two more half pieces on both sides to create a mini weave. Wrap the entire cup with a whole slice of bacon. Repeat to make three more cups. Bake until crispy, about 20 minutes. Let cool for 5 minutes, then remove from tin.
Make dressing: In a medium bowl, whisk together Greek yogurt, lemon juice and chives and season with salt and pepper. Add tomatoes and lettuce and toss to coat.
Fill cups with dressed lettuce and tomatoes. Garnish with more chives to serve.