Salsa Tomat Panggang

Bahan-bahan (4 porsi)

• 4 large roma tomatoes, (whole)
• 1/2 white onion, (peeled)
• 2 whole garlic cloves, (peeled)
• 1 whole jalapeño
• 1/3 cup cilantro, (chopped)
• garam dan merica, (secukupnya)