tomato lentil soup

1 quart clean water
1/2 pound uncooked lentils
8 medium size plum tomatoes
1 tablespoon Olive oil
1/2 tablespoon sea salt

Put the lentils in a fine strainer and rinse under cold water.  Rinse the tomatoes then cut off any stems.  Cut the tomatoes in half from top to bottom.  Put 1 quart of clean water in a 2 quart pot and begin heating on low-medium heat.  Add the lentils, tomatoes, olive oil and sea salt to the water.  Stir the soup every 10 minutes and let it cook for 1 hour.  Turn off the heat and let the soup sit for 10 minutes.