Place your favourite saucepan over medium-high heat.
Toss in the bacon then pour in enough water to just barely cover it. Stir frequently with a wooden spoon. As the water simmers the bacon will begin to cook. Then as the water evaporates the bacon will render, releasing its fat, and will crisp as the fat left behind heats past the boiling point of water into the flavour zone. Stir and be patient, it is worth getting every piece evenly crisped, about five or six minutes. If you like, pour off half or so of the bacon drippings.
Toss in the carrots, onions, celery, and garlic and continue cooking, stirring until the veggies are heated through and their flavour brightens, two to three minutes.
Stir in the lentils, water, salt, and bay leaf. Bring the works to a full boil then lower the heat, adjusting it so the liquid is barely simmering.
Simmer until the lentils are tender and most of the water has been absorbed, about 20 minutes or so.
Stir in the lemon juice and tarragon, serve and share!
This is one of my favourite side dishes because bacon and lentils are perfect together. The rich meatiness of bacon easily complements the earthy hearty flavours of lentils. Try making this dish once and it will instantly become one of your favourites too!