In a large plastic zip bag, combine olive oil, garlic, lemon juice, red wine vinegar, oregano, greek yogurts and salt and pepper. Massage to mix.
Add chicken into the bag.
Massage to make sure chicken is full covered and marinate for at least 20 minutes, up to 12 hours.
Drain the chicken from the marinade, discarding the marinade.
In a skillet, heat some olive oil over medium-high heat.
I used my Anolon Skillet which I love because it heats evenly, is metal utensil friendly, and can be used in the oven up to 400 degrees.
Add chicken when it is hot, and cook, flipping part way through. Cook approximately 3-4 minutes per side. Cooking time depends on thickness and size of the chicken. Cook until internal temp is 165 degrees.
Remove from pan, and let cool.
Once cool, cut into bite sized pieces. Just make sure you let it cool, or all the juice will run out.
Meanwhile, make cucumber salad by chunking the cucumbers, and tossing in a bowl with the lemon juice, olive oil, red wine vinegar, garlic, and oregano. Set aside
Make tzatziki sauce by combining the Greek yogurt, cucumber, garlic, dill weed, lemon juice, lemon zest in a small bowl; season with salt and pepper. And add mint (optional)
Refrigerate while assembling your bowls.
Cook brown rice according to package directions. When finished cooking, divide between meal prep containers, 1/2 cup in each container, halve cherry tomatoes, and mix with red onion slices. Divide amongst the bowls.
Top with chicken, cucumber salad, and some tzatziki sauce.
Keep for 3- 5 days in airtight container, serve cold!