Peel the 200 g of potatoes and cut them into 1 cm dice. The smaller they are, the faster they cook.
Precook the potatoes
Put the diced potatoes in a saucepan of cold water salted with a pinch of salt (half of your pinch). Bring to a boil, then let them simmer 10 min, until a knife tip slides in with no resistance. Drain well.
Prep the onion and mushrooms
While the potatoes cook, slice the onion thin. Wipe the 150 g of mushrooms with a damp paper towel or dish towel, then slice them.
Beat the eggs
Crack the 4 eggs into a mixing bowl, add the pepper and the rest of the salt, then beat with a fork until smooth.
Brown the potatoes
Heat the olive oil in the skillet over medium-high heat. Add the drained potatoes and let them brown 5 min, stirring now and then. Take them out of the skillet and keep them warm on a plate.
Sauté the onion and mushrooms
Put the skillet back over medium heat with the butter. Cook the onion 2 min, add the mushrooms and cook 5 min until the water cooks off and they're golden.
Tip · Don't salt the mushrooms until the end and don't crowd them, or they release their water and boil instead of browning. If your skillet is small, cook them in two batches.
Cook the omelet
Turn the heat down to medium-low and pour the beaten eggs over the mushrooms. Cook 3 min, pulling the edges toward the center, then cover 1 min so the top fully sets.
Tip · The eggs should be fully set, with no runny bits in the center. If the top is still soft, leave the lid on 1 more min off the heat.
Serve
Fold the omelet in half, cut it into two portions and plate with the sautéed potatoes.
And there you go, it's readyCheck off every step to celebrate.
The questions you're asking
short answers, numbers you can check
How many calories in a serving?
One serving has about 322 kcal. 26% comes from carbs, 21% from protein and 50% from fat.
21 gCarbs
17 gProtein
18 gFat
Per serving (the dish for 2, divided by 2)
Energy
322 kcal
Protein
17 g
Carbs
20.8 g
of which sugars
4.4 g
Fat
17.9 g
of which saturated fat
6.3 g
Fiber
3.8 g
Salt
0.6 g
Worked out ingredient by ingredient with the ANSES Ciqual 2025 table, never written by an AI. It's an estimate: veggie sizes and brands make the numbers vary.
How much does it cost?
About $1.29 a serving, adding up the average prices of the ingredients you need to buy.
≈ $2.58for 2 people
≈ $1.29a serving
Pantry salt, oil and spices aren't counted. Your store and your brands will move the total, but the ballpark is right.
How long does it keep?
Eat it fresh. An omelet is best soft, fresh out of the pan: reheated, it turns rubbery. Make it the day you eat it, it's done in 5 minutes!