diff --git a/backend/src/recipes/recipes.service.ts b/backend/src/recipes/recipes.service.ts
index b568e510..8ee2a305 100644
--- a/backend/src/recipes/recipes.service.ts
+++ b/backend/src/recipes/recipes.service.ts
@@ -270,4 +270,35 @@ export class RecipesService {
       summary,
     };
   }
+
+  async findAll() {
+    return this.prisma.recipe.findMany({
+      include: {
+        ingredients: {
+          include: {
+            product: true,
+          },
+        },
+      },
+    });
+  }
+
+  async findOne(id: number) {
+    const recipe = await this.prisma.recipe.findUnique({
+      where: { id },
+      include: {
+        ingredients: {
+          include: {
+            product: true,
+          },
+        },
+      },
+    });
+
+    if (!recipe) {
+      throw new NotFoundException(`Recipe with id ${id} not found`);
+    }
+
+    return recipe;
+  }
 }
\ No newline at end of file
diff --git a/frontend/app/api/recipe-preview-proxy/route.ts b/frontend/app/api/recipe-preview-proxy/route.ts
index 1f4b1c94..41e56286 100644
--- a/frontend/app/api/recipe-preview-proxy/route.ts
+++ b/frontend/app/api/recipe-preview-proxy/route.ts
@@ -5,6 +5,13 @@ const API_BASE = process.env.NEXT_PUBLIC_API_URL_INTERNAL || 'http://recipe-api:
 export async function GET(request: NextRequest) {
   const id = request.nextUrl.searchParams.get('id');
 
+  if (!id) {
+    return NextResponse.json(
+      { error: 'Missing id parameter' },
+      { status: 400 }
+    );
+  }
+
   const res = await fetch(`${API_BASE}/api/recipes/${id}/inventory-preview`, {
     method: 'GET',
     cache: 'no-store',
diff --git a/frontend/features/inventory/types.ts b/frontend/features/inventory/types.ts
index 37db3f10..8025bbb4 100644
--- a/frontend/features/inventory/types.ts
+++ b/frontend/features/inventory/types.ts
@@ -80,11 +80,18 @@ export type RecipePreviewInventoryItem = {
   id: number;
   quantity: string;
   unit: string;
-  brand?: string | null;
-  location?: string | null;
-  bestBeforeDate?: string | null;
-  canConvert?: boolean;
-  convertedQuantity?: number;
+};
+
+export type RecipePreviewMatchingInventoryItem = RecipePreviewInventoryItem & {
+  brand: string | null;
+  location: string | null;
+  bestBeforeDate: string | null;
+};
+
+export type RecipePreviewOtherInventoryItem = RecipePreviewInventoryItem & {
+  location: string | null;
+  canConvert: boolean;
+  convertedQuantity: number;
 };
 
 export type RecipeInventoryPreviewIngredient = {
@@ -96,8 +103,8 @@ export type RecipeInventoryPreviewIngredient = {
   note: string | null;
   availableQuantity: number;
   availableUnit: string | null;
-  matchingInventoryItems: RecipePreviewInventoryItem[];
-  otherInventoryItems: RecipePreviewInventoryItem[];
+  matchingInventoryItems: RecipePreviewMatchingInventoryItem[];
+  otherInventoryItems: RecipePreviewOtherInventoryItem[];
   status: 'enough' | 'missing' | 'unit_mismatch';
   missingQuantity: number;
 };