Rinse the jalapeños, remove the stems, slice in half and scoop out the seeds (since they are quite a few chiles to clean you may want to use gloves). Place them in a large mixing bowl. Rinse the carrots, remove their tops, peel and diagonally slice into about 1/4" thick. Place in the large mixing bowl along with the Jalapeños. Peel the pearl onions of the outer dry skin and add into same bowl. Sprinkle all these vegetables with the salt, toss around and let them sit for about an hour.
Place the white distilled vinegar in the blender along with the water, peppercorns, cumin seed, whole cloves, bay leaves, thyme, oregano and brown sugar. Puree until smooth.
In a large, deep and thick skillet, heat the oil over medium-high heat until hot, but not smoking, for about 2 minutes. Carefully add the salted vegetables, reserving their juices, and fry for about 6 to 8 minutes, stirring here and there, until they begin to soften. Add the garlic cloves, and cook for 2 more minutes.
Carefully add the vegetable reserved juices, along with the white distilled vinegar mix and the rice vinegar. Let it all cook for about 5 more minutes. Turn off the heat and let it cool.
Place in a container with a lid and store in the refrigerator. I like to use glass jars. For some reason they seem to taste even better. Let the vegetables pickle for at least a day before eating. They will keep for months, if you don't finish them before...