If you are looking for an ultra-affordable, deeply nostalgic weeknight dinner that loves your waistline and your blood sugar as much as your wallet, this Budget Tuna ‘Rice’ Casserole is the ultimate answer.
Traditional casseroles rely heavily on processed carbohydrates like white rice or egg noodles, which cause immediate glucose spikes and subsequent energy crashes. This clever remake completely reinvents the classic by swapping out the grains for zero-calorie, high-fiber Shirataki rice. Combined with budget-friendly canned tuna, savory mushrooms, and a creamy base, it gets a massive flavor upgrade from nutritional yeast—giving you a rich, cheesy, and deeply savory depth without adding a single gram of dairy fat or starch. It’s warm, bubbling comfort food at its finest, fully optimized to keep your insulin levels steady and your energy rock-solid.
Glycemic Index Profile
| Ingredient | Glycemic Index (GI) | Load / Impact | Role in Metabolic Health |
| Shirataki Rice (800 g) | 0 | None | Made from soluble glucomannan fiber. It adds exceptional volume and a comforting rice texture while keeping the meal entirely carb-free. |
| Canned Tuna Fish (2 cans) | 0 | None | An incredibly affordable source of high-quality, lean protein that supports muscle maintenance and enhances post-meal fullness. |
| Nutritional Yeast (1/2 cup) | 35 | Very Low | Packed with B vitamins and protein, it provides a deep, cheese-like umami flavor with almost zero impact on blood glucose. |
| Mushrooms (450 g) | 15 | Very Low | Rich in beta-glucans and prebiotic fiber, mushrooms add earthy texture and support optimal immune and metabolic function. |
| Mushroom Soup & Skim Milk | 45 | Low | Creates a smooth, nostalgic casserole creaminess; keeping portions structured prevents significant glycemic shifts. |
The Synergistic Effect: By replacing starchy noodles or rice with shirataki, the overall carbohydrate density of this dish drops dramatically. The heavy presence of lean protein from the tuna combined with the soluble fiber in the shirataki rice creates a slow, highly stable digestive pace, flatlining any potential insulin response.
Budget-Friendly Tuna ‘Rice’ Casserole (Low-Carb)
Description
There is comfort food and then there is comfort food that also comforts your conscience. We pull out the typical noodles and butter-cracker topping on this classic, replacing them with shirataki rice and nutritional yeast. So, fill yourself with a large serving of this comfort food that tastes great.
Ingredients
Instructions
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In a casserole dish, combine mushroom soup, tuna, and mushrooms. Stir well. Add milk. Mix in rice and salt. Add enough milk so the noodles are fairly covered. Top with nutritional yeast. Bake at 350 degrees F / 176 C for 20 minutes.
Nutrition Facts
Servings 4
- Amount Per Serving
- Calories 217kcal
- % Daily Value *
- Total Fat 6g10%
- Saturated Fat 4g20%
- Cholesterol 2mg1%
- Sodium 550mg23%
- Potassium 763mg22%
- Total Carbohydrate 20g7%
- Dietary Fiber 12g48%
- Sugars 5g
- Protein 25.93g52%
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.
Note
This casserole cooks up a little loose and soupy. If desired, add a second can of mushroom soup and simply adjust the calories for a thicker result.
You can also use Shirataki noodles. The rice is simply easier to serve.
You can half the nutritional yeast to reduce calories.
Frozen mushrooms release more liquid, so if you use fresh, you may need to add more milk.
